Sorry you lost this person. Super awful and I'm very sorry you are internalizing blame.
In terms of a plan for my buddy... God I just don't have a clue.
My friend is losing his wife/kids and likely moving back in with his folks. He's pretty medicated and has, in my unprofessional assessment, a high degree of learned helplessness from years of unemployment and doctors trying to sort him out.
He loves art, science, and culture (which we connect on), but I don't feel like sitting around and shooting the shit about post-war American art is going to help him. Nor do I think a 'wake the fuck up or else' is called for. But in the right context, maybe it is?
All I know is his mental health is going to plummet when he loses his identity of being an active father and husband. He barely moves all day as it is, but moving back home I think will break him.
Suicidal ideation weirdly isn't what I fear (even though it is very possible). It is more becoming a perma-zombie and vanishing into this abyss that has emerged. He really is in decline.